Tube vulcanizer



Sept. 7 1926. 1,599,125

. M. A. FLYNN TUBE VULCANIZER Filed Dec.. 11, 1925 INVENTOR. Maw/1:1. A. fir/w ATTORNEY.

' V 1A Cg Petentedfiept. 7, 1926.

UNITED STATES MICHAEL A. FLZHN, or annex, onzm.

,vuncamzna.

A man-insomniac: .n' oza'. Serial No. man

This invention relates to vukzaniaers for nmer tubes of pneumatic tires, {beingde signed and intended to improve upon prior devices for this purpose, and particularly intended and ada ted for the vulcanization of inner tubes w ile. in circular condition and while internally expended by any suitable--'fluid pressure, Buckie-Sir, s or steam. The invention is shoi'w'n ma escvibed for use with chambered orsteam-l jacketed molds. and coff'ri'a igq-ffifltwo-part shell or holder, preferab {wide-from light metal such as I aluminum, in which the tube is placed prior i-g fio. viilcanization, the tube "being subjected to slight: inflation so as to *cause it to fill out the shell, and the tube and shell being ceive the assembly thus obtained. Bv the use of the device a mold may be used economically and efliciently.

parent to those skilled in the art, it being evident with av number of the shells or holders it is possibleto properly position a tube within the shell while the latterflis at "room temperature, thereby avoidtng the necessity. of placing a tube within a hot. mold, which is alwaysbbjectionable from the standpoint of the workman and is also apt to burn or scorch the tube prematurely.

By the use of the apparatus shown and described, these disadvantages are obviated and greater production is obtainable.

Additional objects are the provision of a shell which is strong and easily handled and which will avoid the formation of objectionable rinds or flashes at the lines of separation of the shell sections, the shell being so designed that the rinds referred to will. occur at such pointsthat injury of. the tube or tire casing will be avoided.

Other objects and advantages will be obtained as evident to those skilled in the art to which this invention appertainsand as will be pointed out in the claims, it being understood that changes and modifieations may be made within the scope of the invention, which is not neetssarily limited to exact conformity withthe details set forth herein. I

In the drawings:

Figure 1 i a view'partly in elevation. and partly in section, showing a complete mold unit with a tube therein;

placed "within the chain-j bered mold which is properly shaped to.re-

Figure 2 is a cross-section on the line 2 of Figure 1: and I Figure 3 a detail of the construction at v the valve stem opening. y

The main mold. comprises "two sections 1 and. 2 which are divided along a plane through the center of the-tube that the Tfioldcan be openedjor the removal and in-j cert-ion "of tubes and shells" therein. The mold sections are shown as chambered for b the circulation, of steam, although other means may be used forheating'fthe" mold to proper vulcanizing temperature. Any suitable mechanism (not sho'wn) maybe utilized for holding the mold sections together, 79

The removable shell is shown a hole at 3, being preferably made of anyjsuitable materal, aluminum being preferred for this purposeon account of its light weight the ease with ,which it may be handled. The

r I --shell is shown as composed of two parts The advantages to be gainedwill be ap-' a portion, 0 thefifth are contained in the laIgQI SQCtlOfi' 4,;the remainder of the hexagon bei'ngformed by. e sectinnqit Three sides of the shell Karel-rece ved within c'or rcspondingly shaped recesses in each mold sect 1011. t Y

' ["In this connection it will beobserved that thesliell sections part along lines which iu'e placedon one side of the tube and not dix rectly along its inner and outer peripheries; The location of the lines of parting at the points indicated avoids the rinds at" the" tread -and adjacent the rim. Heretoforethe 1 location of. such rinds in tubes cured the usual molds have been the cause of remature failure of the tire casing and'tu e.

At the point where the valve stem passes through the shell section 4, the latter is re+;.g ceased, as shown it 10, so that thepassage of the valvestein into position is not inter-. feted with. The recess is arranged two-beclosed by a small piece of metal 11, which-- is pinned or otherwise secured upon the mold section 2- in position to lit within the recess when the mold is closed. The mold section 1 is cut away, as at 12, to. permit the molding of tubes with bent valve stems,

of the shell section 4 and the filler piece ll. to receive the ClX'ClllfiJ'. washer 15 which 18 usedto' obtain the requisite compression of the tube about the base of the valve stem.

' veyor, the shell resting for this purpose on the surface :0. The tube is new partially inflated and accurately seated within the section 4, the cover section 5 is placed over the tube, and the assembly is ready to be placed in a mold. When the mold is opened and the vulcanized. tube with its shell removed, a shell with an unvulcanized tube is dropped in its place and the mold closed, the heat of the mold not being dissipated while the tube is being placed in position. The mold is now closed and air or other fluid under pressure is admitted to the interior of the tube through the valve stem and the tube will be vulcanized, as is understood by those skilled in the art. The form of shell may be varied, but the substantial hexagonal tion is preferred, as it affords a very strong --construction and seats readily WVlYhlD the mold cavity.

What is claimed is:

1. In an apparatus for the uses and purposes set forth, a. sectional IIlOl(l,'lI1Cl a. removable shell for receiving an inner tube, said shell being formed in two sections parting along lines lying between the inner and outer peripheries of the shell, the complete shell being receivable in cavities formed in the mold sections.

2. In an apparatus of the character described, u sectional mold, and removable shell for receiving an inner tube, said shell being hexagonal in shape and formedin two sections, one of said sections havin four sides and a portion of a fifth side 0? said hexagon contained therein, the other section ol the shell completing the hexagon.

3. In an apparatus of the character described, a sectional mold, and a removable shell receivable within said mold, the shell being formed in two sections which part along lines within the inner and outer circumference of the shell, one of said sections covering approximately two-thirds of the total crosssectionul CllClillifQlODUG of the tube, the other section completing the shell,

the mold sections huvim cavities therein to receive the complete shell.

4. An apparatus for the vulcanization of inner tubes comprising a sectional chumbercd mold having a recess therein which is hexagonal in cross-section and a removable shell adapted to lit within the recess and adapted to contain the inner tube.

5. An apparatus for the vulcanization of inner tubes con'iprising a sectional chambered mold having a recess therein. which is l'lcxugonul in cross-section and 21V removable t vvopart shell adapted to fit within the recess and adapted to contain the inner tube.

6. An apparatus for the vulcanization ol. inner tubes comprising a sectional mold having a recess therein Whiclris hexagonal in cross-section and a removable shell adaptcd to fit .Within the recess and adapted to contain the inner tube.

7113.11 apparatus for the vulcanization of inner tubes comprising a sectional mold having a recess therein which is hexagonal in cross-section and a removable two-part shell adapt-ed to lit Within the recess and adapted to cont-sin the inner tube.

MICI'IAEL A. ELYNN. 

